E. B. Wilson — Pycnogonida of New England. 
collected at Brooklyn, N. Y., by Prof. D. C. Eaton. It is usually 
found on Hydroids and Ascidians, growing on ]»iles of wharves, and 
occurs down to 14 fathoms. The description of “ Pasithoe umbonata ? ’ 
Gould is so imperfect as to render identification of the species impos- 
sible. What is meant by the “ umbo” of a Pycnogonid is not clear 
to me. 
Achelia Hodge. 
Body broad. Antennre small, two-jointed, not chelate. Palpi 
eight-jointed. Accessory legs ten-jointed, present in both sexes. 
Legs stout ; dactylus with auxiliary claws. 
Achelia spinosa Wilson. 
Zeies spinosa Stimpson, Invertebrata of Grand Manan, p. 37, 1853. 
? Achelia echinata Hodge, Ann. and Mag. Nat. Hist., 3d series, vol. xiii, No. lxxiv, 
p. 115, PL XII, figures 7-10, 1864. 
Plate II, figures 1 a to 1 h. 
Body nearly orbicular, deeply incised, segments not apparent. Lat- 
eral processes separated by a distinct interval. Neck distinct, but 
very broad. Oculiferous tubercle large and prominent, acute. Eyes 
ovate, black. Abdomen very long and slender, bifid at the tip. 
Rostrum large, thickest in the middle and tapering to both ends, 
truncated at the extremity. 
Antenme not quite half the rostrum. The basal joint is about four 
times as long as broad, somewhat swollen near the extremity, where 
there are two or three tubercles, each terminated by a stout hair. 
Second joint rounded and knob-like, with one or two hairs. 
Palpi slightly longer than the rostrum; the first, third, and four 
outer joints are very short, the first somewhat swollen ; the second 
and fourth are much longer and nearly equal; all but the basal joint 
art- hairy, the four outer ones only on the exterior margin. 
Accessory legs in the female rather large. The two basal joints 
are short and stout, followed by three longer and more slender ones. 
The remaining five are much shorter, the terminal one very small and 
nearly globular; it bears two very large flattened denticulated spines; 
each of the two preceding joints has a similar spine; the outer joints 
are sparsely hairy, most of the hairs pointing backward. In the male 
this appendage is much smaller and proportionally stouter; the two 
basal and five distal joints arc nearly as in the female, but the 
third, fourth and fifth are much shorter and stouter. 
Legs rather long ; the three basal joints are short and stout, the 
